From: Rik van Riel <riel@redhat.com>
To: Mel Gorman <mel@csn.ul.ie>
Cc: linux-mm@kvack.org, Nick Piggin <npiggin@suse.de>,
Johannes Weiner <hannes@cmpxchg.org>,
KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>,
KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>
Subject: Re: [PATCH 3/3] mm: page allocator: Drain per-cpu lists after direct reclaim allocation fails
Date: Mon, 16 Aug 2010 10:50:46 -0400 [thread overview]
Message-ID: <4C695046.9000703@redhat.com> (raw)
In-Reply-To: <1281951733-29466-4-git-send-email-mel@csn.ul.ie>
On 08/16/2010 05:42 AM, Mel Gorman wrote:
> When under significant memory pressure, a process enters direct reclaim
> and immediately afterwards tries to allocate a page. If it fails and no
> further progress is made, it's possible the system will go OOM. However,
> on systems with large amounts of memory, it's possible that a significant
> number of pages are on per-cpu lists and inaccessible to the calling
> process. This leads to a process entering direct reclaim more often than
> it should increasing the pressure on the system and compounding the problem.
>
> This patch notes that if direct reclaim is making progress but
> allocations are still failing that the system is already under heavy
> pressure. In this case, it drains the per-cpu lists and tries the
> allocation a second time before continuing.
>
> Signed-off-by: Mel Gorman<mel@csn.ul.ie>
Reviewed-by: Rik van Riel <riel@redhat.com>
--
All rights reversed
--
To unsubscribe, send a message with 'unsubscribe linux-mm' in
the body to majordomo@kvack.org. For more info on Linux MM,
see: http://www.linux-mm.org/ .
Don't email: <a href=mailto:"dont@kvack.org"> email@kvack.org </a>
next prev parent reply other threads:[~2010-08-16 14:51 UTC|newest]
Thread overview: 82+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-08-16 9:42 [RFC PATCH 0/3] Reduce watermark-related problems with the per-cpu allocator Mel Gorman
2010-08-16 9:42 ` [PATCH 1/3] mm: page allocator: Update free page counters after pages are placed on the free list Mel Gorman
2010-08-16 14:04 ` Rik van Riel
2010-08-16 15:26 ` Johannes Weiner
2010-08-17 2:21 ` Minchan Kim
2010-08-17 9:59 ` Mel Gorman
2010-08-17 14:25 ` Minchan Kim
2010-08-18 2:21 ` KAMEZAWA Hiroyuki
2010-08-16 9:42 ` [PATCH 2/3] mm: page allocator: Calculate a better estimate of NR_FREE_PAGES when memory is low and kswapd is awake Mel Gorman
2010-08-16 9:43 ` Mel Gorman
2010-08-16 14:47 ` Rik van Riel
2010-08-16 16:06 ` Johannes Weiner
2010-08-17 2:26 ` Minchan Kim
2010-08-17 10:42 ` Mel Gorman
2010-08-17 15:01 ` Minchan Kim
2010-08-17 15:05 ` Mel Gorman
2010-08-17 10:16 ` Mel Gorman
2010-08-17 11:05 ` Johannes Weiner
2010-08-17 14:20 ` Minchan Kim
2010-08-18 8:51 ` Mel Gorman
2010-08-18 14:57 ` Minchan Kim
2010-08-19 8:06 ` Mel Gorman
2010-08-19 10:33 ` Minchan Kim
2010-08-19 10:38 ` Mel Gorman
2010-08-19 14:01 ` Minchan Kim
2010-08-19 14:09 ` Mel Gorman
2010-08-19 14:34 ` Minchan Kim
2010-08-19 15:07 ` Mel Gorman
2010-08-19 15:22 ` Minchan Kim
2010-08-19 15:40 ` Mel Gorman
2010-08-19 15:44 ` Minchan Kim
2010-08-19 15:46 ` Minchan Kim
2010-08-19 16:06 ` Mel Gorman
2010-08-19 16:45 ` Minchan Kim
2010-08-18 2:59 ` KAMEZAWA Hiroyuki
2010-08-18 15:55 ` Christoph Lameter
2010-08-19 0:07 ` KAMEZAWA Hiroyuki
2010-08-19 19:00 ` Christoph Lameter
2010-08-19 23:49 ` KAMEZAWA Hiroyuki
2010-08-20 0:22 ` [PATCH] vmstat : update zone stat threshold at onlining a cpu KAMEZAWA Hiroyuki
2010-08-20 14:54 ` Christoph Lameter
2010-08-20 17:29 ` Andrew Morton
2010-08-23 7:18 ` Mel Gorman
2010-08-16 9:42 ` [PATCH 3/3] mm: page allocator: Drain per-cpu lists after direct reclaim allocation fails Mel Gorman
2010-08-16 14:50 ` Rik van Riel [this message]
2010-08-17 2:57 ` Minchan Kim
2010-08-18 3:02 ` KAMEZAWA Hiroyuki
2010-08-19 14:47 ` Minchan Kim
2010-08-19 15:10 ` Mel Gorman
-- strict thread matches above, loose matches on Subject: below --
2010-08-23 8:00 [PATCH 0/3] Reduce watermark-related problems with the per-cpu allocator V2 Mel Gorman
2010-08-23 8:00 ` [PATCH 3/3] mm: page allocator: Drain per-cpu lists after direct reclaim allocation fails Mel Gorman
2010-08-23 23:17 ` KOSAKI Motohiro
2010-08-31 17:37 [PATCH 0/3] Reduce watermark-related problems with the per-cpu allocator V3 Mel Gorman
2010-08-31 17:37 ` [PATCH 3/3] mm: page allocator: Drain per-cpu lists after direct reclaim allocation fails Mel Gorman
2010-08-31 18:26 ` Christoph Lameter
2010-09-03 9:08 [PATCH 0/3] Reduce watermark-related problems with the per-cpu allocator V4 Mel Gorman
2010-09-03 9:08 ` [PATCH 3/3] mm: page allocator: Drain per-cpu lists after direct reclaim allocation fails Mel Gorman
2010-09-03 23:00 ` Andrew Morton
2010-09-04 2:25 ` Dave Chinner
2010-09-04 3:21 ` Andrew Morton
2010-09-04 7:58 ` Dave Chinner
2010-09-04 8:14 ` Dave Chinner
[not found] ` <20100905015400.GA10714@localhost>
[not found] ` <20100905021555.GG705@dastard>
[not found] ` <20100905060539.GA17450@localhost>
[not found] ` <20100905131447.GJ705@dastard>
2010-09-05 13:45 ` Wu Fengguang
2010-09-05 23:33 ` Dave Chinner
2010-09-06 4:02 ` Dave Chinner
2010-09-06 8:40 ` Mel Gorman
2010-09-06 21:50 ` Dave Chinner
2010-09-08 8:49 ` Dave Chinner
2010-09-09 12:39 ` Mel Gorman
2010-09-10 6:17 ` Dave Chinner
2010-09-07 14:23 ` Christoph Lameter
2010-09-08 2:13 ` Wu Fengguang
2010-09-04 3:23 ` Wu Fengguang
2010-09-04 3:59 ` Andrew Morton
2010-09-04 4:37 ` Wu Fengguang
2010-09-05 18:22 ` Mel Gorman
2010-09-05 18:14 ` Mel Gorman
2010-09-08 7:43 ` KOSAKI Motohiro
2010-09-08 20:05 ` Christoph Lameter
2010-09-09 12:41 ` Mel Gorman
2010-09-09 13:45 ` Christoph Lameter
2010-09-09 13:55 ` Mel Gorman
2010-09-09 14:32 ` Christoph Lameter
2010-09-09 15:05 ` Mel Gorman
2010-09-10 2:56 ` KOSAKI Motohiro
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=4C695046.9000703@redhat.com \
--to=riel@redhat.com \
--cc=hannes@cmpxchg.org \
--cc=kamezawa.hiroyu@jp.fujitsu.com \
--cc=kosaki.motohiro@jp.fujitsu.com \
--cc=linux-mm@kvack.org \
--cc=mel@csn.ul.ie \
--cc=npiggin@suse.de \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).